CSV to JSON Converter

Convert CSV and Excel to JSON

Turn a CSV, TSV, or Excel spreadsheet into a clean JSON array of objects. The first row becomes the object keys and every subsequent row becomes an object, so a familiar table converts into the structured JSON your code or API expects. You can paste the text directly or drop in a file.

Spreadsheet support goes beyond CSV: upload an .xlsx or .xlsm workbook and its first sheet is converted to JSON in your browser — the file is read locally and never uploaded to a server.

CSV to JSON converter online — how it works

This CSV to JSON converter online takes three steps: parse, map, and output. First it detects your delimiter (comma, semicolon, or tab) by scanning the file — you can override the guess if needed. Then it maps the header row to object keys and each data row to an object. Finally it outputs a JSON array ready to copy, download, or paste straight into your code or API.

Because the converter runs entirely in your browser, it works offline once the page has loaded and never sends your data to a server. That makes it a safe choice for converting sensitive spreadsheet exports — customer lists, financial data, or configuration tables — to JSON without any privacy risk.

Smart parsing: delimiters and types

Good CSV-to-JSON conversion is more than splitting on commas. This tool sniffs whether your data is comma, semicolon, or tab separated and lets you override the guess. With type inference enabled, numeric and boolean cells become real JSON numbers and booleans instead of strings — so 42 comes through as 42, not "42" — which is almost always what you want downstream.

Convert spreadsheet data to JSON online

Turn the contents of a spreadsheet into JSON your code can use. Paste CSV or TSV text, or upload an .xlsx workbook, and the first row becomes your object keys while every other row becomes an object. To convert CSV to JSON format your code can consume directly, enable type inference so numbers and booleans come through as their native JSON types rather than strings. It is the quickest way to get exported spreadsheet data into an API request, a seed file, or a test fixture — and the file is parsed in your browser, never uploaded.

CSV to JSON format — convert CSV into JSON your code can use

Converting CSV to JSON format is a standard step in data pipelines: your data starts in a spreadsheet or export file and your API, database, or code expects a JSON array of objects. This converter uses the CSV header row as object keys and each data row as an object, producing a JSON array in the format that JSON.parse and every JSON library accept directly.

A CSV to JSON formatter does more than swap delimiters. It handles quoted fields with embedded commas, escaped characters, and multi-line values. With type inference enabled it promotes numeric cells to JSON numbers and boolean-looking strings to true or false, so the result is ready to use without a post-processing step. Choose your delimiter — comma, semicolon, or tab — to match the source file.

Export CSV or TSV to JSON

To export CSV to JSON, paste CSV text or drop a .csv or .tsv file — the converter produces a clean JSON array instantly, entirely in your browser. Type inference handles the translation from spreadsheet types to JSON types automatically, so numeric and boolean cells arrive as native JSON values rather than strings.

Working from an Excel workbook rather than a CSV export? The dedicated Excel to JSON converter reads .xlsx and .xlsm files directly — the first sheet becomes a JSON array of objects, with headers as keys and types preserved — so you don't have to save to CSV first.